Exhaust-nozzle for power-boats.



WQE'. GEYER. EXHAUST NOZZLB FOB POWER BOATS. APPLIoATIoN FILED H121, 1910.

987,1 30. Patented 11u21, 1911.

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WILLIAM E. GEYER, 0F CAMBRIDGE, MASSACHUSETTS.

EXHAUST-NOZZLE FOR POWER-BOATS.

Application filed April 21, 1910.

Specification of Letters Patent.

Patented Mar. 21, 1911.

Serial No. 556,804,

To all whom it may concern:

Be it known that I, VViLLIAM. Ill. GErER, a citizen of the United States, and a resident of Cambridge, in the county of Middlesex and Gommonwcaltl'i of Massachusetts, have invented certa-in new and useful Improvements in Exhaust-Nozzles for Power-Boats, of which the following is a specification.

In power boats and other small craft employing internal combustion engines for their propulsion, it is customary to have the engines exhaust through a submerged nozzle directed toward the stern. A diliiculty found with this arrangement is that when the boat is reversed, the inrushing water interferes with the exhaust; floating debris enters the nozzle and chokes it, or drifting seaweed catches thereon.

The purpose of my invention is the construction of a nozzle for such exhaust which shall automatically change its direction of discharge to accord with the movement of the boat, and be incapable of collectingseaweed or being filled with flotsam.

Referring to the drawings forming part of this specification, Figure l is a cross section of a water craft showing my improved. exhaust nozzle applied thereto. Fig. 2 is a longitudinal section of more or less of the same, drawn on a larger scale. Fig. 3 is a horizontal section of the nozzle on the line X'-X in Fig. 2.

The boat selected for illustration is of usual construction and has its shell designated by the reference numeral 1. The ifnternal combustion engine 2 for the rotation of the propeller shaft 3, discharges its exhaust gases through the pipe 4 to the nozzle 5 at the exterior of the boat below the water-line. Said nozzle consists of a. tubular elbowthe vertical member 7 of which is rotatably connected with the outer end of the exhaust pipe 4; said member preferably passing through the shell of the boat. To suitably support said elbow, said member loosely lits within a sleeve 9 which is tightly held in place in the shell by means of a shoulder 10 at the exterior, and a thimble 11 having a shoulder or nut 12 within the shell, as shown in Fig. 2. To the inner extremity of said thimble is secured the end of the pipe 4, by a union or other suitable means 13. To retain the member 7 within said sleeve, a ring 14 is fastened upon the inner end of said member, as by screws 15; the relative lengths of said sleeve and member being such as to bring said ring just beyond the end of the sleeve.

To guard against'. the collection of seaweed against the upcurved part of the exhaust nozzle, the shoulder 10 is given a sharp periphery litting clos-e against the surface of the boat, so that it forms a frustum of a cone, the inner periphery thereof inclosing the shoulder 16 of the member 7. The exhaust nozzle being thus pivoted to freely swing fore and aft of the boat, it will be made by the pressure of the water to take a direction opposed to the direction the boat is moving. In other words, the nozzle will always take a direction to direct its exhaust in the opposite direction to that toward which the craft is moving. That the nozzle will always `be thus shifted by t-he water, is made clear when it is noticed that its normal position when acted upon by gravity alone will be a more or less vertical one, inasmuch as its point of attachment is at the side of the boat, and not directly beneath. Consequently, when the craft is stationary and the nozzle thus pendent, the moment the boat begins to move the pressure of the water swings the nozzle rearward therewith, and the faster the motion, the more closely does t-he nozzle approach the horizontal. To aid in this automatic shifting of the nozzle, I l

prefer t-o provide the same with a fin 17 along its free end, as shown in Figs. 1 and 2. I also prefer to form the exhaust nozzle 5 substantially hemispherieal, with its flat face toward the surface of the boat, as shown in Fig. 1, in order to provide ample discharge capacity and at the same time keep the same close to the boat-surfaee Thus made, the exhaust nozzle will always be made to direct the exhaust in the same direction wit-h the water flowing past, and so will not only relieve the exhaust 0f any back-pressure, but will in addition form a suction acting to increase the freedom of the exhaust.. The exhaust nozzle can be readily removed by unsorewing the thimble 11 from its engagement with the sleeve 9, after which both said sleeve and nozzle can be withdrawn together.

What I claim as my invention and for which I desire Letters Patent is as follows, to wit:-

1. The combination with a boat, an engine and an exhaust means opening through the side of the boat below the water line, of an exhaust nozzle therefor pivotally attached to the exterior of the boat to enable it to be freely swung by the action thereagainst it of the water, and so to deliver the exhaust in a direction opposite to the boats motion through the water.

Q. The combination with a boat having an engine adapted to deliver its exhaust at a point of the boats side below the water line, of a tubular elbow having one member thereof passing through the boats side and freely turning therein, and adapted to receive the exhaust through said member and to deliver it into the water.

3. The combination of a boat having an opening through its side below the water line, an engine adapted to deliver its exhaust to said opening, a tubular elbow having one member thereof rotatably supported in said opening and receiving said exhaust, the other end of said elbow being at the exterior of the boat, and a iin located at the lastnamed end.

4. The combination with a boat having an opening through its side, and an engine adapted to, deliver its exhaust at said opening, of an exhaust nozzle comprising an elbow one member of which is rotatably held by said boat in said opening to receive the exhaust, the discharge member of the nozzle being substantially semicylindrical with its fiat face toward the surface of the boat.

5. The combination with a boat having an opening through its side, and an engine having a pipe for delivering its exhaust to said opening, a sleeve fixed in said opening, an exhaust nozzle having one member rotatable in said sleeve and its other member substantially parallel With the surface of the boat, and a ring fixed to the inner end of said rotatable member and bearing against the inner end of said sleeve.

6. The combinationwith a boat having an opening through its side, and an engine having a pipe for delivering its exhaust to said opening, a sleeve fixed in said opening and having a conical flange or shoulder fitted against the outer surface of the boat, and an exhaust nozzle having one member rota tably mounted within said sleeve and formed with a shoulder inclosed by said flange or shoulder, the other member of said nozzle being substantially parallel with the surface of the boat.

In testimony that I claim the foregoing invention, I have hereunto set my hand this 20th day of April, 1910.

WILLIAM E. GEYER.

Witnesses:

A. B. UPHAM, D. W. PEN'rz.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

